Gardner, A. B. Piano Serial Nos.

1901	24000
1902	26000
1904	30000
1906	35000
1908	40000
1910	45000
1912	52000
1914	60000
1916	62500
1918	71000
1920	78000

It is remarkable that data on piano serial numbers has survived so well for over a century. However, some inaccuracies are inevitable. These serial numbers are to be used only as a rough guide to a piano's age. An exact date does not make a material difference to a piano assessment. To be within 2 to 5 years is accurate enough to give an informed report on a piano.